CN1008798B - Exothermic, slag trapping and insulating covering agent - Google Patents
Exothermic, slag trapping and insulating covering agentInfo
- Publication number
- CN1008798B CN1008798B CN 87107622 CN87107622A CN1008798B CN 1008798 B CN1008798 B CN 1008798B CN 87107622 CN87107622 CN 87107622 CN 87107622 A CN87107622 A CN 87107622A CN 1008798 B CN1008798 B CN 1008798B
- Authority
- CN
- China
- Prior art keywords
- exothermic
- insulating covering
- slag
- present
- covering agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
The present invention relates to a novel exothermic slag collecting thermal insulating covering agent cast material. The present invention has functions of heat generation, slag collection, thermal insulation, deoxidation and desulfuration simultaneously to dissolved metal when added into a ladle before casting, the heat generation temperature can reach 1650DEG C at the highest level, and cast defects, such as slag inclusions, air holes, clefts, etc., in a cast product can be effectively eliminated, so the present invention is an ideal iron melt purifying treating agent. The technology yield can be effectively raised by about 15%.
Description
The present invention relates to a kind of exothermic, slag trapping and insulating covering agent product, it belongs to the improvement of deposite metal in the casting ladle before the metal casting being handled used material.
At China's ferrous metal casting industry, traditional plant ash is continued to use in deposite metal insulation before the casting in the casting ladle always, China's early eighties begins to develop perlite and replaces plant ash to make coverture, the external special-purpose coverture of casting of also having developed, the coverture product that in the middle of above these existing technology, is provided, though the specification requirement of deposite metal body temperature in the time of can satisfying casting, but, perlite coverture that abroad provide and domestic development costs an arm and a leg, its purifying molten iron effect is not obvious, heating, desulfurization, deoxidation does not possess, though the perlite coverture has the function of collection slag, but collection slag blanket wall built-up is serious, often causes and waters the ladle-lining damage, so people want to seek a kind of desirable coverture always.
The objective of the invention is: a kind of have simultaneously heating, collection slag, insulation, purifying molten iron are provided, the coverture of desulfurization, deoxygenation function, it is big to make it caloric value, and heat loss is little, and collection slag blanket surface tension is big, and wall built-up coverture raw material sources are not extensive, and are with low cost.
The present invention is achieved in that exothermic, slag trapping and insulating covering agent is made up of exothermic mixture, skim agent, heat preserving agent and mixed aid, through selecting materials, pulverize, oven dry, mix processing and preparing.
Characteristics of the present invention are: one, exothermic mixture is that heating deoxidizing agent aluminum-powder and potassium nitrate are formed by heating desulfurizing agent-silicon calcium powder.Two, skim agent is by prepared by pearlite.Three, heat preserving agent is made up of vermiculite and perlite.Four, mixed aid is made up of oxidant-di-iron trioxide iron powder, combustion adjuvant-potassium nitrate, adhesive-fluorite, filler-red sand.Five, the proportioning of various auxiliary agent mixes is: silicon calcium powder 1-5%, aluminium powder 1-5%, perlite 45-70%, vermiculite 15-25%, ferric oxide two powder 1-5%, potassium nitrate 4-7%, fluorite 1-3%, red sand 8-15%.Six, the various compositions of coverture will be ground into Powderedly or granular, and perlite, vermiculite, fluorite, red sand and di-iron trioxide brown iron oxide that its granularity is less than in 3 millimeters, seven, coverture will dried under the temperature more than 20 ℃.
Further specify in conjunction with the accompanying drawings.Accompanying drawing 2 is exothermic, slag trapping and insulating covering agent composition schematic diagrames.1 is heating deoxidier aluminium powder among the figure, and 2 are heating desulfurizing agent silicon calcium powder, and 3 is the skim agent perlite, and 4 is heat preserving agent vermiculite and perlite, and 5 is oxidant di-iron trioxide iron powder, and 6 is combustion adjuvant potassium nitrate, and 7 is the surfactant fluorite, and 8 is the filler red sand.
The present invention has compared following advantage with traditional technology: one, have heating function, its heating temp can reach 1650 ℃, and fever time is 2 minutes and 12 seconds.Two, have desulfurization, deoxidation technology performance, further purified molten iron.Three, heat loss is little, and heat-insulating property is good, can emit a large amount of reaction heat, forms the excellent insulating layer, drops to 1450 ℃ from 1550 ℃ and takes time 19 minutes, shown in accompanying drawing one.Accompanying drawing 1 is the grey cast-iron molten iron, 125 kilograms of casting ladles adopt the insulation curve of plant ash, perlite and exothermic, slag trapping and insulating covering agent, among the figure, 1 for plant ash coverture insulation curve 2 is the insulation line taking of pearlite insulation coverture, and 3 is the insulation curve of exothermic, slag trapping and insulating covering agent.Four, big, the present invention of collection slag blanket surface tension is 0.2kg/cm
2, the perlite coverture is 0.07kg/cm
2, the present invention collects slag blanket and wall built-up not.Five, pore, slag inclusion and the crackle of eliminating foundry goods had significant effect, can obviously improve the yield rate of product, general comparable perlite coverture improves product yield rate, about 15%.Six, easy to operate.Seven, metallographic structure and the mechanical performance for the body of casting all has certain benefit, especially spheroidal graphite cast-iron had the good elimination ball effect of declining.
Inventor's a embodiment is: the exothermic, slag trapping and insulating covering agent that is applicable to spheroidal graphite cast-iron, through selecting materials: aluminium powder 3% by following proportioning, silicon calcium powder 3%, brown iron oxide 3.5%, potassium nitrate 2.5%, fluorite 1.5%, perlite 56.5%, vermiculite 19%, red sand 11%, general's solid composition wherein is ground into the granular or powdery less than 3 millimeters of granularities respectively, and perlite, vermiculite, red sand, brown iron oxide and fluorite that will be wherein dry under 70 ℃ of temperature, and mix according to the above ratio stirs then, through quality inspection, pack with moisture barrier bag and to form.Its Applicable temperature is 1300 ℃-1650 ℃, and its addition is 0.3% of a metal liquid weight, the adding mode: mill or specific purpose tool spreads casting ladle metal liquid surface equably with iron.Through the product yield rate 15% that improved on probation.
The present invention can be widely used in the ferrous metal casting industry, be specially adapted to cast steel, hold steel, spheroidal graphite cast-iron and casting pig, can be applied to various forging types such as conventional cast, hot investment casting and continuous casting, can also make the exothermic, slag trapping and insulating covering agent that is applicable to that cast steel, special steel and spheroidal graphite cast-iron etc. are special-purpose according to the material difference of metal liquid.As cast steel exothermic, slag trapping and insulating covering agent etc.
Claims (2)
1, a kind of exothermic, slag trapping and insulating covering agent that is used for the cast iron casting ladle is characterized in that its silicon calcium powder by 1-5%, the aluminium powder of 1-5, the 45-70% perlite, the vermiculite of 15-25%, three oxygen two of 1-5% are changed iron powder, the potassium nitrate of 4-7%, the fluorite of 1-3%, the red sand of 8-15% is formed.
2, heat preservation agent according to claim 1 is characterized in that various compositions are powdery or granular, and its granularity is less than 3 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107622 CN1008798B (en) | 1987-11-04 | 1987-11-04 | Exothermic, slag trapping and insulating covering agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107622 CN1008798B (en) | 1987-11-04 | 1987-11-04 | Exothermic, slag trapping and insulating covering agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032960A CN1032960A (en) | 1989-05-17 |
| CN1008798B true CN1008798B (en) | 1990-07-18 |
Family
ID=4816172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87107622 Expired CN1008798B (en) | 1987-11-04 | 1987-11-04 | Exothermic, slag trapping and insulating covering agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008798B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060107C (en) * | 1995-08-21 | 2001-01-03 | 中国科学院金属研究所 | Efficient heat-generating agent for delay solidification of molten metal |
| CN1327994C (en) * | 2005-03-22 | 2007-07-25 | 浙江湖州红鹰企业集团有限公司 | Heat preservation agent in use for molded casting, and producing technique |
| CN102757240B (en) * | 2011-04-25 | 2013-09-04 | 宝山钢铁股份有限公司 | Heating panel used in steel ingot head heat insulation |
| CN102554141B (en) * | 2012-02-24 | 2016-08-31 | 上海市机械制造工艺研究所有限公司 | A kind of heating covering agent for casting steel piece |
| CN102814475A (en) * | 2012-07-31 | 2012-12-12 | 马鞍山科润冶金材料有限公司 | Heating agent for casting stainless steel ingot heads and preparation method of heating agent |
| CN104308106B (en) * | 2014-10-08 | 2016-07-06 | 吴江市液铸液压件铸造有限公司 | A kind of ladle covering agent |
| CN106311999B (en) * | 2015-06-30 | 2019-03-26 | 上海梅山钢铁股份有限公司 | A kind of pre-fused exothermal pouring slag |
| CN111069543B (en) * | 2019-12-23 | 2021-11-09 | 山东钢铁股份有限公司 | Low-carbon alkaline molten steel heat-preservation covering agent and preparation method thereof |
-
1987
- 1987-11-04 CN CN 87107622 patent/CN1008798B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032960A (en) | 1989-05-17 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |